PVA (polyvinyl alcohol) film water scraping and drying device

Abstract

The utility model discloses a PVA (polyvinyl alcohol) film water scraping and drying device which comprises a first solution tank body and a second solution tank body which are sequentially arranged along the conveying direction of a PVA film, a first guide roller is arranged in the first solution tank body, and a second guide roller is erected above the rear end of the first solution tank body. A third guide roller and a fourth guide roller are sequentially erected above the front end of the second solution tank body, a fifth guide roller is arranged in the second solution tank body, a first glass scraper and a second glass scraper are arranged between the second guide roller and the third guide roller, the second glass scraper is vertically arranged below the first glass scraper, and a drying oven is arranged between the third guide roller and the fourth guide roller; a feeding port is formed in a left side plate of the drying oven, a discharging port is formed in a right side plate of the drying oven, a plurality of transmission rollers arranged up and down are arranged in the drying oven, and a plurality of heating rods are arranged on the top face and the bottom face in the drying oven. According to the utility model, the water scraping and drying treatment of the PVA film can be simultaneously realized, and the effect of rapid water removal is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to polaroid production field, concretely relates to a PVA film water scraping drying device. BACKGROUND

[0002] PVA film is the key material that produces polarizing effect in polaroid, and it forms the film with polarizing effect after water washing, swelling, dyeing, stretching, color compensation, squeezing water and drying processes. Among them, the polaroid will cut off the solution in each groove during the stretching process. The existing technical solution is to use EPDM rubber pinch roller to squeeze water, but the rubber pinch roller is long and has certain flexibility, which cannot squeeze the solution in the PVA film, so as to cause the solution concentration in different grooves to cross, the solution concentration changes constantly in the production process, and the change of the solution concentration directly affects the dyeing and fixing effect of the PVA film and has direct influence on the product optical, which reduces the product yield. SUMMARY

[0003] The utility model discloses to aim at the deficiency of above -mentioned prior art, provide a kind of PVA film water scraping drying device, PVA film can be simultaneously realized water scraping and drying treatment, reach the effect of rapid water removal;It simultaneously improves the stability of polaroid production, and solution concentration changes little.

[0004] The technical scheme adopted by the utility model is as follows:

[0005] A kind of PVA film water scraping drying device, it includes first solution groove body and second solution groove body arranged in sequence according to PVA film transmission direction, the inside of first solution groove body is equipped with first guide roller, second guide roller is erected on the rear end of first solution groove body, third guide roller and fourth guide roller are erected in sequence on the front end of second solution groove body, the inside of second solution groove body is equipped with fifth guide roller, first glass scraper and second glass scraper are equipped between second guide roller and third guide roller, second glass scraper is equipped below first glass scraper, the vertical direction of the lower end of first glass scraper and the upper end of second glass scraper is formed into staggered arrangement, drying oven is equipped between third guide roller and fourth guide roller, inlet is equipped on the left side plate of drying oven, outlet is equipped on the right side plate of drying oven, a plurality of transmission rollers are arranged in drying oven, and a plurality of heating rods are arranged on the top surface and bottom surface of drying oven;PVA film passes through first guide roller, second guide roller, first glass scraper and second glass scraper, third guide roller, drying oven, fourth guide roller and fifth guide roller in sequence.

[0006] Preferably, first glass scraper and second glass scraper are installed on the top of first solution groove body by fixed support.

[0007] Preferably, the contact angle between the blade surface of first glass scraper and the upper surface of PVA film is 79.5 °, and the contact angle between the blade surface of second glass scraper and the lower surface of PVA film is 81.5 °.

[0008] Preferably, both the first and second glass scrapers have rounded edges.

[0009] Preferably, the first and second glass scrapers are pressed into the PVA film to a depth of 5 cm.

[0010] Preferably, the oven is mounted above the second solution tank via a fixed bracket.

[0011] The beneficial effects of this invention are as follows: This invention uses a set of glass scrapers to replace the original rubber clamping rollers to dewater the PVA film. Because the edges of the glass scrapers have a rounded corner structure and the glass scrapers are pressed into the PVA film to a depth of 5cm, more than 90% of the moisture inside the PVA film can be reduced during the conveying process. In order to ensure that the solution concentrations in the two solution tanks do not cross, an oven is installed before entering the second solution tank to dry the PVA film. This allows all the remaining moisture inside the PVA film to be dried before entering the second solution tank. In this way, the solution concentration of the PVA film will not change during a week of normal production, and the yield of polarizers is also improved. Attached Figure Description

[0012] Fig. 1 This is a schematic diagram of the structure of this utility model;

[0013] Fig. 2 This is a schematic diagram of the structure of the drying oven in this utility model;

[0014] In the figure: 1. First solution tank; 2. Second solution tank; 3. First guide roller; 4. Second guide roller; 5. Third guide roller; 6. Fourth guide roller; 7. Fifth guide roller; 8. First glass scraper; 9. Second glass scraper; 10. Oven; 11. Feed inlet; 12. Discharge outlet; 13. Drive roller; 14. Heating rod; 15. PVA film. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings:

[0016] like Figs. 1-2 As shown, the present invention provides a PVA film scraping and drying device, which includes a first solution tank 1 and a second solution tank 2 arranged sequentially in the transmission direction of the PVA film 15. The first solution tank 1 is provided with a first guide roller 3 inside, a second guide roller 4 is mounted above the rear end of the first solution tank 1, a third guide roller 5 and a fourth guide roller 6 are mounted sequentially above the front end of the second solution tank 2, and a fifth guide roller 7 is provided inside the second solution tank 2. These guide rollers are used to transmit the PVA film 15.

[0017] The first glass scraper 8 and the second glass scraper 9 are arranged above the first solution tank body 1, and the moisture scraped off by the PVA film 15 directly flows into the first solution tank body 1, so that solution waste is reduced.

[0018] The second glass scraper 9 is arranged below the first glass scraper 8, the lower end of the first glass scraper 8 and the upper end of the second glass scraper 9 are arranged in a staggered manner in the vertical direction, the contact angle between the blade surface of the first glass scraper 8 and the upper surface of the PVA film 15 is 79.5°, the contact angle between the blade surface of the second glass scraper 9 and the lower surface of the PVA film 15 is 81.5°, and the relative staggered angle between the first glass scraper 8 and the second glass scraper 9 can effectively scrape water from the PVA film 15 with different material ratios, so that the PVA film 15 is not scraped by the scraper due to excessive tension, and the production efficiency is affected.

[0019] The position surface of the first glass scraper 8 and the second glass scraper 9 contacting the PVA film 15 is smooth, and the edges of the first glass scraper 8 and the second glass scraper 9 are provided with a transition fillet structure, so that the PVA film 15 is not scraped or deformed; in use, the depth of the first glass scraper 8 and the second glass scraper 9 pressed into the PVA film 15 is 5cm, so that the moisture inside the PVA film 15 can be scraped off faster.

[0020] The third guide roller 5 and the fourth guide roller 6 are provided with an oven 10, the oven 10 is arranged above the second solution tank body 2 through a fixing support, the left side plate of the oven 10 is provided with an inlet 11, the right side plate of the oven 10 is provided with an outlet 12, a plurality of transmission rollers 13 are arranged in the oven 10, a plurality of heating rods 14 are arranged on the top surface and the bottom surface in the oven 10, so that the solution concentration in the first solution tank body 1 and the second solution tank body 2 does not cross, the PVA film 15 after water scraping is dried by the oven 10 before entering the second solution tank body 2, so that the residual moisture in the PVA film 15 can be dried, the solution concentration of the PVA film 15 does not change in normal production for one week, and the yield of the polarizing plate is improved.

[0021] The PVA film 15 sequentially passes through the first guide roller 3, the second guide roller 4, the first glass scraper 8 and the second glass scraper 9, the third guide roller 5, the oven 10, the fourth guide roller 6 and the fifth guide roller 7, in the transmission process, the PVA film 15 does not bring the solution in the first solution tank body 1 into the second solution tank body 2, and the stability of the whole production process is ensured.

[0022] The use process of the utility model is as follows:

[0023] In use, the PVA film 15 is first introduced into the solution of the first solution tank 1 by the first guide roller 3 for processing, and the processed PVA film 15 is then introduced out of the solution of the first solution tank 1 by the second guide roller 4, and then passes between the first glass scraper 8 and the second glass scraper 9, and the PVA film 15 is subjected to water scraping treatment by the first glass scraper 8 and the second glass scraper 9, in the process, more than 90% of the water in the PVA film 15 can be reduced, and the scraped water directly flows into the first solution tank 1; then the PVA film 15 is introduced into the oven 10 by the third guide roller 5 for drying treatment, so that the remaining water in the PVA film 15 can be completely dried before entering the second solution tank 2, and the dried PVA film 15 enters the second solution tank 2 under the double action of the fourth guide roller 6 and the fifth guide roller 7 for next process, and the solution concentration in the first solution tank 1 and the second solution tank 2 is not crossed in the whole production process.

[0024] The other parts not mentioned in the utility model are the same as the prior art.

Claims

1. A PVA film wiping and drying apparatus, characterized by It includes the first solution tank body (1) and the second solution tank body (2) arranged in turn in the transmission direction of the PVA film (15), the inside of the first solution tank body (1) is provided with a first guide roller (3), the upper side of the rear end of the first solution tank body (1) is provided with a second guide roller (4), the upper side of the front end of the second solution tank body (2) is provided with a third guide roller (5) and a fourth guide roller (6) in turn, the inside of the second solution tank body (2) is provided with a fifth guide roller (7), the first glass scraper (8) and the second glass scraper (9) are arranged between the second guide roller (4) and the third guide roller (5), the second glass scraper (9) is arranged below the first glass scraper (8), the lower end of the first glass scraper (8) and the upper end of the second glass scraper (9) are arranged in a staggered manner in the vertical direction, the third guide roller (5) and the fourth guide roller (6) are provided with an oven (10), the left side plate of the oven (10) is provided with an inlet (11), the right side plate of the oven (10) is provided with an outlet (12), the inside of the oven (10) is provided with a plurality of transmission rollers (13) arranged in an up-down manner, the top surface and the bottom surface of the inside of the oven (10) are provided with a plurality of heating rods (14); the PVA film (15) passes through the first guide roller (3), the second guide roller (4), the first glass scraper (8) and the second glass scraper (9), the third guide roller (5), the oven (10), the fourth guide roller (6) and the fifth guide roller (7) in turn.

2. The PVA film wiping and drying apparatus according to claim 1, wherein The first glass scraper (8) and the second glass scraper (9) are mounted above the first solution tank body (1) through the fixed support.

3. The PVA film wiping and drying apparatus according to claim 2, wherein The contact angle between the blade surface of the first glass scraper (8) and the upper surface of the PVA film (15) is 79.5°, and the contact angle between the blade surface of the second glass scraper (9) and the lower surface of the PVA film (15) is 81.5°.

4. The PVA film wiping and drying apparatus according to claim 3, wherein The edges of the first glass scraper (8) and the second glass scraper (9) are provided with a transition fillet structure.

5. The PVA film wiping and drying apparatus according to claim 4, wherein The depth of the first glass scraper (8) and the second glass scraper (9) pressed into the PVA film (15) is 5cm.

6. The PVA film wiping and drying apparatus according to claim 1, wherein The oven (10) is mounted above the second solution tank body (2) through the fixed support.

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